Apparatus for the combustion of pollutants carried in a waste gas flow
CA 2037864 A1 · Owner: Wirl, Ernst · Inventors: Wirl, Ernst
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device for the combustion of pollutants carried in a waste gas flow is equipped with heat exchanger pipes which lead from a gas inlet chamber to a gas combustion chamber. The combustion gases after the combustible pollutants have been burned off, are guided to flow around the heat exchanger pipes to a gas exit port. In order to enable the heat exchanger pipes to accommodate or compensate temperature expansions and contractions, each heat exchanger pipe is provided intermediate its ends with a double bend having an approximate Z- or S-configuration so that the pipe ends extend approximately in parallel to one another. The intermediate pipe sections or legs between the double bends may …
Read the whole patent
Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed March 8, 1991. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 8, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 8, 2013.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.